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(No Mom.) l sheetsfsheep 1. A. SMITH 85 I-I. W. WHITEHBAD.

SCREW RILLv DRAWING MACHINERY.

10.347,655. Patented Aug. 17, 1886.

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A.. SMIT-1I n-H. W. WHITEHEAD.

SCREW' GILL DRAWING MAGEINERY.

No. 347,655. Patented-Aug. 17, 1886.

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SCREW GIL!JV DRAWING MACHINERY.

No.3 7,655. I Patented'Aug. 17 8863.Y

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UNITED "STATES PATENT' OFFICE.

ALBERT SMITH, OF BRADFORD, AND HENRY WALTON VHITEHEAD, OF

LEEDS, COUNTY OF YORK, ENGLAND. Y

SCREW-GILL DRAWIN'G MACHINERY.

SPECIFICATION forming part of Letters Patent No. 347,655, dated August 17,1886.

Application filed November 12, 1885. Serial No. 1552.607. (No model.)

To all whom it may concern:

Be it known that we, ALBERT SMITH and HENRY VVALTON VHITEHEAD, subjects of the Queen of Great Britain and Ireland, and residing, respectively, at Bradford and Leeds, both in the county of York, England, have invented certain Improvements in Screw Gill Drawing Machinery, of which the following is a specification.

The object of this'invention is to more clearly draw and straighten the sliver and lay the bers parallel with each other preparatory to combing, drawing, roving, or spinning; and the invention consists in the construction and combination of parts hereinafter particularly described and claimed.

In the accompanying drawings, Figure 1 represents the sectional elevation of such portions of a gill or preparing box as are required to make clear our invention. Fig. 2 is a sectional plan of the same. Fig. 3 is aview of the screws drawn to an enlarged scale; and Figs. 4, 5, and 6, end views of the screws, showing the cams for the raising and lowering of the fallers. Fig.

7 represents an enlarged section through the single-threaded screws A and B, showing the fallers in position and the cams for raising and lowering the fallers. Fig. 8 is a plan of a portion of both the single and double threads 5 and Figs. Q'and 10 are end views of the fallers, showing the angle of the portion at the ends that travel in the screw-spaces.

The gill or preparing box is of the ordinary construction and actuated in the usual manner;` but instead of having the screws the same pitch throughout for traversing the fallers, or having four separate screws driven from each end by gearing, we make each of the top screws, A and A', in one piece, and cach of the bottom screws, B and B', for returning the fallersV in one piece also, and drive the same by the bevel and spur wheels C and O in the samegmanner as when the machine is Vfitted with screws of the same pitch throughout. One portion of the top and bottom screws next to the feedrollers D are cut'with single threads for trav-` eling the fallers 5 but the remainder of the screws are cut with double or more pitched threads, the thickness of the single and double threads, however, being the same, so as tokeep the fallers of each set the same distance apart,

. threads.

'which causes the fallers to travel quicker through the ber, and thereby straighten the same more thoroughly and make the sliver more even than when the fallers are at varying distances apart. The ber is fed by the feed-rollers D to therst set of fallers, F,which pass through the ber in the ordinary manner as far as the ordinary stops S; but on the ber coming to the second set of fallers, F', traversed by the double-pitched screws A', they pass through the ber at double the speed of the fallers F, thereby obtaining double the amount of draft, which more thoroughly straightens' the ber and enables us to manipulate the same with fewer machines than when operated upon in the ordinary manner. The singlepitched screws A and B are provided with single camsG and G, the cams G being at the termination of the single threads or screws A, for the purpose of lowering the fallers F, and cams G for raising them from the bottom to the top screw, A, as in ordinary machines. The double-pitched screws are provided with double cams H and H', the cams H lowering the fallers F to the bottom screws and cams H raising them from the bottom to the top, the ends of the threads for receiving them being prepared in the same manner as in singlethreaded screws. In case treble threaded screws are used, each screw or thread is provided with a cam for operating the fallers, thus insuringV their `keeping in their respective The fallers F are of the ordinary construction supported by the bars C2, extending almost the entire length of each portion of the screw, space being left at each end for the fallers to pass from one screw to the other.

On putting the machine in motion the screws A and Brevolve, causing the fallersF to travel in the direction indicated by the arrow until they reach the upright stopbars S, at the end of the single-threaded screws, where they are operated upon by cams G,and thereby lowered to the bottom screw, B, by which they are carried back to the opposite end of the screw and again raised by cams G to the top screw, A. Thus by these means the fallers F are continually rising and falling and passing through the ber. The traveling, raising, andlowering ofthe fallers F', operated by the double-threaded screws IOO tially the saine general construction as in the present case, but the screw-threads are of different thicknesses, while in our construction they are of the same thickness7 as specified in the following elainl.

Vhat we elailn iS- rllhe eo1nbination,with the two sets of fallers FF andthe cams for operating the san1e,of the top screws, each made in one piece and formed with single threads A and double threads A of the same thickness, the bottom screws, each made in one piece and formed with the single threads B and double threads B of the same thiekness,and gearing C C', for operating said several screws, substantially as described.

In testimony whereof wc have signed our names to this specification in the presence of two subscribing witnesses.

ALB". SM ITU. HENRY WAI/FON Wlll'lllIlEAl).

Witnesses:

JonN GILL, RD. B. NIoHoLLs. 

